Dear All. Re antenna pre-amp, I have just looked through the handbook for this rx, and page 21 says there is a 100kHz low pass filter included in the circuit. Regards. Ken M0KHW From: owner- rsgb_lf_
Dear All. I am having problems with the choice of material for the output network of the 475kHz Valve TX . The network is an L – C – L, ‘T’ network with an input impedance of
Hi Stfan. I have been looking at the 77 type material, but waiting for other group members opinion. 73 Ken From: [email protected] [mailto:[email protected]] On Beha
Hi Clements. What calculation did you use? I can send you the calculations I used if you like the values have been independently checked on LT Spice 1V. 73 Ken M0KHW Hi Ken, I believe two of your com
Dear All. I have recently purchased a Watson W-SDRX1 100kHz – 2Ghz SDR RX. Has any one on the group had any experience of this SDR module especially downloading and installing the operating sof
Dear All I am now having to receive this groups messages to [email protected] via Yahoo (there is/was a BT Yahoo tie up). Where there are multiple messages on a thread Yahoo is grouping the
Hi Alan. Thank you for your reply, I have been getting all the LF groups messages, blacksheep.org, through Microsoft Outlook, now it looks like I will have to get my @btinternet.com email s via Yahoo
Hello all LF’s Just received my NoV for 501 – 504 kHz, effective until 29th Feb 2008, is this a common end date, as I only have 5 months. Hope to be active ASAP. 73 Ken Wright M0KHW Luton
Hello John. Thanks for the reply, my RX is a Kenwood TS140S with a pre-amp, TX will be xtal controlled, ant will be my 102ft doublet with both legs of the feeder commoned at the Variometer to form a
Hi Laurence. Try www.aade.com You will have to put up with the site adverts, the filter design covers Chebyshev, Butterworth etc. I have tried it and it is ok, it will even do a full analysis for and
Has anyone experienced problems using an IRF530N in a 500kHz PA?. I am using an IRF530N into an L C L output network the design parameters for the network are input:10 ohms, output 50 ohms, centre f
Hi Alan, Thanks for the reply, I am trying to run it in pseudo class C, driving it from a xtal controlled osc, 10mW output into a buffer/driver amp. 73 Ken M0KHW Hi Ken I suggest you are probably not
Further info on my QSO with Rik OR7T last night, I was using a tunable pre-amp with a gain of 3 - 10dB gain in front of my Kenwood TS140 )used as RX only), the antenna is a 102ft doublet with the 8m
I worked OR7T at 21:20 utc last evening in Luton IO91TV, very good signal, I gave him 477. 73 M0KHW IO91TV .. on 503.1 kHz, in QSO with a G-stn which is not audible here at the moment. 73, Wolf (lurk
Hello All. After a stumbling start I should be back on 500kHz early next week after a rebuild of my driver board to use with the PA that Chris G3XIZ kindly built for me. If all goes well I should be
Hi Peter. How many watts is the PL519 running?, I have some 807s I was thinking of using, but they like 750 volts on the anode. Regards. Ken M0KHW Hello LFers, This is a short description of my 500kH
